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Pancreas - Anatomy & Physiology (view source)
Revision as of 08:43, 22 July 2008
, 08:43, 22 July 2008→Histology
***Interlobar ducts are found in the connective tissue septa between lobules.
***Interlobar ducts are found in the connective tissue septa between lobules.
***Interlobar ducts join to form either the pancreatic or the accessory duct.
***Interlobar ducts join to form either the pancreatic or the accessory duct.
**These ducts drain into the duodenum.
****These ducts drain into the duodenum.
**In some cases the pancreatic duct unites with the bile duct, and bile and pancreatic juice enter the duodenum together.
****In some cases the pancreatic duct unites with the bile duct, and bile and pancreatic juice enter the duodenum together.
===Endocrine===
===Endocrine===
[[Image:Islet cell types.jpg|thumb|right|150px|Islet of Langerhans - © RVC 2008]]
[[Image:Islet cell types.jpg|thumb|right|150px|Islet of Langerhans - © RVC 2008]]
*Islets of Langerhans are embedded in the exocrine tissue.
*Islets of Langerhans are embedded in the exocrine tissue.
*Each islet is composed of 2 - 3 thousand epithelial cells.
*Epithelial cells are arranged in a compact structure that is pervaded by a capillary network.
*A thin layer of reticular fibres seperates the islets from surrounding exocrine tissue.
*There are ''four'' different cell types within the islets of Langerhans that each produce different hormones.
**α cells produce glucagon. Typically located at the periphery of the islet. Not present in all islets.
**β cells produce insulin. The predominant cell type, located in the centre of the islet and contributing to 70% of all cells.
**δ cells produce somatostatin. Low numbers in all islets.
**F cells produce pancreatic polypeptide and are few in number, and may be present in the exocrine tissue also.
==Species Differences==
==Species Differences==